ZARF2068-TV INA Catalog

Needle roller/axial cylindrical roller bearings ZARF, double direction, for screw mounting

d	Bore diameter	20 mm
D	Outside diameter	68 mm
H	Hight	46 mm
Ca	Basic dynamic load rating, axial	33.500 N
C0a	Basic static load rating, axial	76.000 N
Cr	Basic dynamic load rating, radial	14.900 N
C0r	Basic static load rating, radial	22.400 N
Cua	Fatigue load limit, axial	6.400 N
Cur	Fatigue load limit, radial	3.400 N
nG Oil	Limiting speed for oil lubrication	7.000 1/min
nG Grease	Limiting speed for grease lubrication	2.000 1/min
MRL	Bearing friction torque	0,5 Nm
≈m	Weight	0,495 kg
Da max	Maximum diameter of housing shoulder	43 mm
da min	Minimum diameter shaft shoulder	33 mm
H1	Height outer ring over wave washer	29 mm
C	Width, outer ring	14 mm
C1	Distance to lubrication hole	8 mm
D1	Rip diameter shaft washer	42 mm
B	Width, inner ring	10 mm
rmin	Minimum chamfer dimension	0,3 mm
r1 min	Minimum chamfer dimension	0,6 mm
d1	Diameter lubrication hole	3,2 mm
J	Pitch circle diameter (holes)	53 mm
n	Number (screwing holes)	8
n x t	Split	45 °
Tmin	Operating temperature min.	-30 °C
Tmax	Operating temperature max.	120 °C
caL	Rigidity axial	1.800 N/µm
ckL	Tilting stiffness	230 Nm/mrad
Mm	Mass moment of inertia	0,615 kg * cm²
radial	Recommended INA precision locknut for radial locking (not included)	ZMA20/38
axial	Recommended INA precision locknut for axial locking (not included)	AM20
MA	Tightening torque nut	18 Nm
na	Number of screws	8
na x ta	Division (screwing holes)	45 °
Cage	plastic cage	TV